Lock



. Jan. 19, 1932 J. J. DREXLER ET AL 9 LOCK Filed F915. 24, 1928 2 Sheets-Sheet 1 Jan. 19, 1932. J. J. DREXLER ET AL 1,342,079

- LOCK Filed Feb. 24, 1928 2 Sheets-Sheet 2 gvvuanto'as G 1 244M 945 W h 61cm M10415 I Patented Jan. 19, 1932 UNITED STATES PATENT OFFICE JOSEPH J. DREXLER AND JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNORS T SARGENT & COMPANY, OF NEW HAVEN, GONNEGTIOUT LOCK ' Application filed February 24, 1928. Serial No. 256,691.

This invention relates to locks, and more especially to looks wherein a quiet operation is considered of importance In hospitals and similar institutions, as well as in some other installations of looks, it is very desirable that the operation of the lock mechanism itself be accomplished substantially noiselessly or at least without the accompaniment of sufficient noise to be disturbing. In addition to the fact that a noiseless operation of the lock mechanism itself is desirable, it is also.

advantageous to insure against the rattling of the bolt in the strike after it is thrown. The

last named function has been accomplished by providing the lock strike member with a tapered housing into which the bolt is pro tracted, so that the bolt will be projected until it contacts with the converging sides of the housing between which it Will fit snugly and by which its protracting movement will be limited. In locks embodying the usual locking mechanism it is, however, impossible to lock the bolt in a partially protracted position, and it is contemplated by this inven tion to provide means by which the bolt when used with such a strike member may be locked in substantially any position of protraction between the extreme in and out positions, as well as in fully thrown position.

One object of our invention, therefore, is to provide a lock wherein the action of the locking mechanism takes place in a substantially. noiseless manner.

Another object of the invention is to provide a lock wherein the bolt carrier will be tightly and firmly held in place in a lateral direction, so as to prevent noisy operation thereof.

A still further object of our invention is to provide a lock having the foregoing objects in view, and of which the mechanism may be operated easily, or in other words, in which the parts will not work so'stifliy as to be objectionable.

A still further object of the invention is to provide alock, having a. reciprocable bolt and means to dog or lock said bolt in various protracted, positions.

Still another object of the invention is to provide a lock havinga bolt capable of being protracted to various intermediate positions between its retracted and fully protracted positions, and in which the boltinay be locked in various intermediate protracted positions. To these and other ends,.the invention consists in the novel features and combinations of parts to be hereinafter described, and claimed.

In the accompanying drawings:

Fig. 1 is a fragmentary front elevational view of a door and door casing, having applied thereto a lock embodying my improvements;

Fig. 2 is a front elevational view of the lock case and mechanism contained therein, the front cover of the case having been removed;

Fig. 3 is a, view similar to Fig. 2 of the portion of the mechanism in the upper part of the case, showing the bolt in protracted position;

Fig. 4 is a View similar to Fig. 3, showing the bolt in a partially protracted position;

Fig. 5 is a sectional view on line 5-5 of Fig. 2;

Fig. 6 is a rearside view of the key operated slide;

Fig. 7 is a rear elevational view of the strike member, and

Fi 8 is a sectional view on line 88 of Fig.

To illustrate a preferred embodiment of our invention, we have shown in Fig. 1 a door 10, and a door casing 11, the door having a lock case 12 mortised therein, in the usual manner, and having mounted on the exterior thereof an escutcheon 18, in which is provided a key-hole 1 4 and a knob 15. In the casing or jamb 11 is a strike plate 16, which as will be presently described, has a strike receiving housing of tapered formation to receive the lock bolt.

Referring to Fig. 2, wherein the parts of the locking mechanism are more especially shown, this mechanism comprises a bolt 17 carried by an actuating stem 18, provided with a slot 19, and also provided at its lower side with a depending car 20. Upon the car 20 is a post 21, to which is pivoted a link 22, the link being pivoted at its other end to a knob operated roll-back 23.

As shown in Fig. 5, a post 25 stands upwardly from the back of the lock case and extends through the slot 19, so that the bolt carrying member or stem 18 is supported and guided upon the post. In order to provide for a noiseless operation of the bolt carrier 18, we provide washer 26 between the bolt carrier and the back of the lock case. This washer surrounds the post 25 and will preferably be formed of non-metallic material. In practice, we have found a fibre washer very suitable for this purpose. A second and similar washer 27 is mounted above or on the front side of the bolt car *ier 18, so that the latter slides between these two washers. The washer will also be of non-metallic material, preferably fibre. Between the washers 26 and 27 is a third washer or ring 28 of non metallic material, which surrounds the post 25 and which is received within the slot 19 so that the bolt carrier slides upon the washer 28, which serves as a bearing member for the carrier about the post 25. A spring 29 surrounds the post and reacts between the front face of the lock case and the upper washer 27, so as to resiliently urge the washers 26 and 27 and the bolt carrier toward the back of the lock case, and in firm contact with each other. It will be apparent that the tension on this spring may be increased to some extent by means of the screw 30, which passes through the face 31 of the lock case, the face being removable as usual.

The lock strike mounted upon the door casing 11, is shown particularly in Figs. 7 and 8, and comprises a strike plate 82. iaving thereon a housing 33 within which the bolt is received. From an inspection of Fig. 8, it will be seen that the opposite side walls of this housing converge toward the rear end thereof. The bolt, upon being protracted, will enter the housing until its edges contact with the converging side walls, whereby further protraction will be stopped and the bolt will fit tightly between the walls of the housing at this point, so that it will not rattle in the strike opening. It will be apparent, however, that in many instances, and depending, of course, upon the relative widths of the bolt and the housing opening, the former will not be completely protracted but will strike against the housing walls when in a partially thrown position. As it is desirable to be able to lOCK or dog the bolt in protracted position, we have provided means to this end which will now be described.

In that part of the lock case above the bolt is provided a locking dog 34, pivoted on a post 35. A. spring 86 reacts against a post 37 secured to the case, and after passing about the post 35 has its free end 38 in engagement with a shoulder 39, formed integrally with the dog 34, so that the latter is urged in an anti-clockwise direction about the post 35. This dog is provided with a number of bolt engaging surfaces 40, in saw tooth or ratchet tooth form, any one of which may drop behind the upper rear corner of the bolt 17 depending upon its position, to lock the bolt in a plurality of different protracted positions. The dog 34 is also provided with an upstanding finger 41, by which it may be controlled. The rear upper corner of the bolt is slightly cut away as at 42, so that the engaging surfaces 40 will fit tightly thereagainst and any danger of the dogging member being cammed upwardly by pressure upon the bolt will be avoided.

A dog controlling slide 43 is slidably mounted above the dog 34, and is provided with slots 44 and 45, in which are received the posts 37 and 46 respectively, so that this slide will be properly guided in its movements by these posts which are secured to the lock case. A spring 47 is secured at one end to the slide and reacts against post 48, secured to the lock case to hold the slide firmly in its proper position and prevent any tend ency of the same to rattle. This slide is provided upon its rear side, as shown in Fig. 2, or upon the front side, as shown in Fig. 6, with a detent 49, which contacts with the finger 41 upon the dogging member 34, to turn the dogging member in a clockwise direction when the slide is retracted, as shown in Fig. 2, against the tension of the spring 36.

A tumbler 50 is pivoted upon the post 37 to control the operation of the slide, the tumbler being provided with a detent 51. which engages in the usual manner a post 52, upon the slide, so that the latter will be controlled by the tumbler in a well known manner. The tumbler is urged and normally held in lock controlling position by the spring 58, having its lower end engaged with the tumbler and its upper end reacting against the post 48.

The slide 43 is provided with the usual talons 54, adapted to be engaged by the key after the tumbler is moved to lock releasing position.

The operation of the device is as follows: It will be apparent that by movement of the knob 15, or a thumb turn, if it is preferred to provide the latter on one side of the door, the bolt 17 may be protracted to the desired extent until it comes into contact with the converging walls of the strike housing 83, and is thereby stopped. The bolt stem will ride upon the fibre bearing washer 28, and will be held firmly between the two noise deadening washers 26 and 27, the parts all being held tightly together by the spring 29, so that the action of the bolt operating mechanism will be noiseless.

If it is now desired to lock the bolt in the position to which it has been thrown, a key is inserted through the key opening 55, and rotated to throw the tumbler 5O upwardly until the member 52 is released from control of the detent 51. Further rotation of the key will cause its bit to engage one of the talons 54 to throw the slide 43 forwardly, or to the position shown in Figs. 3 and 4. The detent 49 in this position, has been moved forwardly until it no longer engages the finger 41 on the dogging member 34, and the latter is, upon its release, rotated in an anti-clockwise direction by the spring 36 until one of the bolt engaging surfaces 40 drops behind the upper rear corner of the bolt and dogs it against retraction.

In Fig. 3 of the drawings, we have shown the bolt dogged or locked in its fully protracted position, while in Fig. 4 of the drawings, we have shown the bolt only partially thrown and dogged by the first tooth or bolt engaging surface on the dog 34. It will, of course, be apparent that while we have shown the dog engaging the rear end of the bolt head, it is within our invention to effect the dogging of the bolt by engagement of the dog 34 with the stem or bolt carrying member, if desired.

On the face of the tumbler is provided a recess 56, best shown in Fig. 5, wherein is mounted a coil spring 57, which reacts against the lock case to hold the tumbler firmly in position against the slide 43 and prevent rattling of the parts. Also on the dogging member 34 we may provide a finger 58, designed to engage a detent 59 at the lower part of the slide 43, to prevent the dogging member being cammed out of position by the lock when the bolt is only partially thrown. In Fig. 4, where the bolt is shown as engaged with the first tooth of the dogging member, this finger is shown in engagement with the detent 59. It may, of course, be arranged to contact with this detent in other positions of the parts if desired.

Nhen the slide 43 is moved forwardly to release the dogging member 34, it will be apparent that the lug or detent 59 will strike the finger 58 and initially move the dogging member toward its position behind the bolt. Also, it will be seen, when the parts are in the position shown in Fig. 2, and the bolt in retracted position, it will be impossible to move the slide forwardly, as the finger 58 will stand in the path of the detent 59 and prevent the movement of the slide. In this position of the parts, the dogging member cannot be thrown downwardly to permit the finger 58 to move from this engaging position on account of contact between the lower part of the dogging member 34 and the upper edge of the lock bolt. It will be impossible then to throw the slide to locking position until the bolt is at least partially protracted.

While we have shown and described a preferred embodiment of our invention, it is to be understood that it is not to be limited to all the details shown, but is capable of modification and variation within the spirit of the invention andwithin the scope of the appended claims.

What we claim is: 1. A lock provided with a reciprocable bolt having. a retracted position and a fully protracted position, and means to dog said bolt either in fully protracted position or in intermediateprotracted position between the fully protracted position and the retracted position, said means comprising a member movably mounted in the lock case and resiliently urged to dogging position, and a keycontrolled member having a lost motion connection with said dogging means to hold the same in inoperative position.

2. A lock having a reciprocable bolt and a dogging member to dog said bolt in protracted position, said dogging member having a plurality of bolt engaging surfaces whereby the bolt may be dogged in a plurality of positions, and a key controlled slide having a part in the path of said dogging member to hold the latter in inoperative position.

3. A look having a protractible bolt, a spring pressed pivoted bolt dogging member, said member having a plurality of engaging surfaces to dog the bolt in a plurality of different protracted positions, a slide operatively mounted in the lock case and having a part to engage the dog and hold it in inoperative position, and means to move the slide to release the dog to permit operation thereof by its spring.

4. A lock having a protractible bolt and a bolt operating member, packing members mounted on opposite sides of the bolt operating member, spring means to hold the bolt operating member and packing members in close engagement, and a noise deadening member upon which the bolt operating member is carried.

5. A look having a case, and a protractible bolt mounted within the case, a bolt carrying member, a bearing member carried by the case upon which the bolt carrying member is supported, and a non-metallic noise deadening member mounted on the bearing member between the bolt carrying member and the case, a second non-metallic noise deadening member mounted on the opposite side of the bolt carrying member, and means to urge said last named noise deadening member against the carrying member.

6. A look having a case, a reciprocable bolt mounted in the case, a stem upon which the bolt is carried, a stud projecting through the stem upon which the latter slides, a noise deadening bearing member mounted on the stud to support the stem, noise deadening members mounted on the stud on oposite sides of the stem, and means urging said last named members against the stem.

7 A lock having a protractible bolt, a spring pressed dogging member having a plurality of engaging surfaces to dog the bolt in a plurality of different protracted positions, a key operated controlling member for the dogging member, said controlling member having means to engage the dogging member to prevent movement thereof, either to or from operative position.

In Witness whereof, we have hereunto set our hands this 28rd clay of January, 1928.

JOSEPH J. DREXLER. JOHN H. SHAWV. 

